Can't Change CPU Clock Ratio Over 39x

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Greggzy

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Dec 27, 2013
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Hi all,

So I'm not really new to building machines, but the world of OCing is completely foreign to me. I've done plenty of research on it and I'm fairly confident that I know how to do it. I'm running a 3770k with 8GB Kingston 1333Mhz RAM on a GIGABYTE GA-Z68AP-D3 (rev. 1.0).

I go into my BIOS (Those with a GIGABYTE board may know better where I am in the BIOS) Into CMOS Setup Utility then Advanced Frequency Settings where I have the option to change the CPU Clock ratio. The max it lets me set it to is x39 but this is a fairly weak overclock for a 3770k.

I've heard about multiple things to fix it, but still nothing:
Disable Intel Turbo - Done and no change.
Update BIOS to UEFI - (My board doesn't have a UEFI BIOS Download )
Update BIOS to latest version - Already done

I have a feeling my board will need upgrading but this isn't really the time for me to be spending more money. Christmas bills are more than extensive.

 
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Leave the multiplier on auto. It will automatically change itself according to your system needs.
Your overall processor core clock speed is determined by a product of bus speed and the multiplier.

The thing you want to change in the BIOS is the Bus speed.
 
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@4745454b I was hoping for about a x42-45 ish. Even if my chip wouldn't go that high. I just want to freedom to be able to set it right up there and test stability. As you say it will probably be a limitation on the board. I will give the manual a read and if I cant see anything in there then contacting GIGABYTE will be my final option.

@JuX Hmm, like I say I am very new to the world of OCing, but I have been following this guide - http://www.overclock.net/t/910467/the-ultimate-sandy-bridge-oc-guide-p67a-ud7-performance-review as the board is very similar to my own.
 
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You will need to enable that BLCK/DMI/PEG option.
The next thing is to change that frequency, at the guide it's 100.0 MHz (number there is 1000)
Changing the number to for example, 1050, will make your bus speed 105.0 MHz
So if you have your multiplier at 34, it will mean your CPU clock speed will be:
34 x 105 = 3.57 GHz

It's really simple. On my i3 530 processor I don't have to change the multiplier to a fixed number because when my processor is under load it automatically switches to the max multiplier. So I guess you can leave the multiplier on auto/default, whatever your BIOS shows because, when needed, it will automatically jump to highest speeds.
This is only my consideration.
 
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That is right. But increase the amount gradually - download a program called OCCT for stress testing your CPU when you overclocked it. In that program you can also see your CPU temperatures. You need to see if it's stable.

Alternatively, you can download prime95 (a good stress testing program) and CPUID HWMonitor for monitoring CPU temperatures.
 
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I have these downloaded already. But I'm already running into problems. I tried sticking with the base clock ratio of 35 and changing the BCLK to 1010, saved, rebooted and it failed twice. Then it finally went back in, I went to BIOS and got an error saying "The system has experienced boot failures because of overclocking or changes in voltage. Latest settings in BIOS may not coincide with current H/W states".

I will figure it out eventually. Thanks for your help with my question though!
 
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Except you cant. The SB/IB CPUs are very different from your i3 530. On that CPU the multiplier is fixed at max or can drop down to 6. (Or you can manually set it in the bios at any number between.) On the SB/IB chips you HAVE to change the CPU multiplier because the bus is now fixed and you can't/shouldn't OC it. On these system ALL the buses are tied to the system bus and OCing one will change them all. This brings about horrible system stability. This is why Intel gave us the K chips, which allow multiplier changing.

 
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So I am going to need a new board to get anywhere?
 
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No. SB/IB are the code names for the CPUs. His CPU works differently then yours. In his case the CPU is bus speed open and multiplier locked. In your case the bus speed is locked while the multiplier can be open if you have a K chip. There is some mild room to OC the bus on your system, but you are usually limited to around 5MHz or so. I'm not surprised at all that 110MHz failed. x39 is probably the top, more so if you are using the newest/latest bios. 100MHz * 39 = 3.9GHz. Very low for the 3770.

Looking online real quick I see that's the boost speed for the 3770. It's not OC'd at all. Are you sure you have the newest bios? Are you sure you have a 3770K and not a 3770? You either haven't turned something off of auto, or something isn't right.
 
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100% sure its a 3770k and 100% sure my BIOS is up to date. The last update for my BIOS was the F8 (http://www.gigabyte.com/products/product-page.aspx?pid=3897#bios) which I installed about 6 months ago.
However I am just noticing now that under my system specs in Windows, where it gives system specs it tells me i7-3770k CPU @ 3.5Ghz with a 3.8Ghz next to it. I've never noticed the 3.8 before?

As far as things that could be turned off what am I looking for? I have my Turbo Settings disabled, C1E Disabled, EIST Disabled, C3, C6 States Disabled and the CPU Thermal Monitor disabled. That is just going off what the guide is telling me for stability with voltage and the multiplier.

When I have looked this up, a lot of people with the same issue have said a UEFI Update to the BIOS has fixed it, but since I don't have a UEFI update for my board, I am pretty screwed.
 
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There should be some option to change the CPU clock speed from auto to manual. Or something similar. All that you've disable from what you wrote is the sleep states. So it's keeping the CPU at 3.5GHz with a 3.8 or 3.9 boost. I'm not sure if boost remains on if you turn all that off.

I'm looking at page 34 on your manual. In your bios, the max value for "CPU clock ratio" is 39? Your board might not allow OCing as it states under that, "Allows you to alter the clock ratio for the installed CPU. The adjustable range is dependent on the CPU being installed." I thought all Z68 boards allowed this. But looking at this list I don't see what should be took off of auto.

I also work nights. I'm heading off to sleep now so won't be replying. Hopefully someone else can chime in. Can you find a review of this board online? See how they OC'ed it? Here is one where they take a 2500k up to 4.9GHz. Don't say how they did it. Perhaps another site would be more helpful.

http://www.bit-tech.net/hardware/motherboards/2011/10/11/gigabyte-ga-z68ap-d3-review/2
 
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